1. Rautomead Limited
Rautomead
Technology for
Precious Metals
Casting.

2. Rautomead Limited
Rautomead Limited
Dundee Scotland
Founded 1978
Sir Michael Nairn
Chairman
Brian Frame MD appointed 2008
Employees = 50
No Machines Sold = 360
First 1978
Of these :-
133 for Precious Metal
production

3. Rautomead Limited
Rautomead – Head Office
Dundee, Scotland UK

4. Rautomead Limited
Rautomead – Head Office
R&D casting facility + Spare Parts Stores

5. Rautomead Limited
Rautomead – Unit 7A Nobel Road Factory
Machine assembly & pre shipment testing

6. Rautomead Limited
Rautomead – Unit 7A Nobel Road Factory
Machine assembly & pre shipment testing

7. Rautomead Limited
Experts in Continuous Casting Technology
• Rautomead are the ONLY supplier of continuous casting technology to offer:
• UPWARDS casting for WIRE ROD
• UPWARDS casting for TUBE SHELL
• HORIZONTAL casting for BILLET
• HORIZONTAL casting for STRIP
• DOWNWARDS casting for SMALL HOLLOW

8. Rautomead Limited
Wire Rod Casting Technology
CuOF CuMg Brass
Enamelled wires Contact wires for EDM machining
wire
Data cables high speed trains
Transformer strips

9. Rautomead Limited
5,000 – 10,000
Tonnes /year

10. Rautomead Limited
Bars & Billets for Foundry applications
Bronze Hollow Zinc Billets
Bearings Automobile wheel
weights

11. Rautomead Limited
RT
RMJ
RMT
RVS
PRECIOUS METALS CASTING
TECHNOLOGY

12. Rautomead Limited
EXPERIENCE
• Rautomead have been supplying graphite furnace continuous casting systems
for gold and silver production to MINTS around the world since 1985.
• More than 130 reference installations for Precious Metals casting
• Machines originally supplied more than 25 years ago STILL IN OPERATION
• Rautomead offer:
– Reliable Operation & simple maintenance
– Excellent Technical Support
– High quality cast product
– Technology with long operational life
• Many Mints have several Rautomead casting lines
• Some Mints initially selected another equipment supplier, but subsequently
invested in Rautomead equipment.

13. Rautomead Limited
MINTS
Customers include Model
Shanghai Mint, China 2 x RMJ/H 025, 2 x RMT 150
Shenyang Mint China 1 x RMJ/H025
Shandong Zhaojin China 2 x RMJ/H025
Perth Mint, Australia 2 x RMJ/H 025, RMJ/H 005,
2 x RMT 200
Sunshine Mint USA RT 400, RM050, 2 x RMT 200
Royal Canadian Mint, Canada RMT 200, RMT 150
Royal Thai Mint, Thailand 2 x RMJ/H 025,
Statna Mincovna, Slovavak Rep. RMJ/H 025
Rand Refinery S. Africa RMT 100
SilverTowne Mint USA RMT200
The Central Mint of China, Taiwan 2 x RMJ/H 005 1 x RMJ/H025
Royal Mint, UK 2 X RMT 150
Polish State Mint, Poland RMJ/H 005

14. Rautomead Limited
RT model – Silver Casting Installations
Customer Model Purpose Year
Leach & Garner, USA RT 850 Extrusion Billet 2013
GSM Metals Inc. USA RT 650 Strip 2010
Sunshine Minting Inc, USA RT 650 Extrusion Billet 2008
Cimini & Associates, USA RT 850 Extrusion Billet 2008
Academy Precision Materials, USA RT 850 Strip 2006
Metalli Preziosi SpA, Italy RT 650 Strip 1993
Carrs of Sheffield Ltd, UK RT 650 Strip 1991

15. Rautomead Limited
RMT model – Silver Casting
recent installations
Customer Model Purpose Year
Silvertowne Mint, USA RMT 200 Strip 2013
Zhejiang Huangcheng, China RMT 200 Strip 2012
Shanghai Mint, China RMT 200 Strip and billet 2010
Perth Mint, Australia RMT 200 Extrusion Billet 2009
Morvillo, USA RMT 200 Extrusion Billet 2007
Perth Mint, Australia RMT 100 Extrusion Billet 2007
Morvillo, USA RMT 200 Strip 2006
Academy Precious Metals, China RMT 200 Strip 2006

16. Rautomead Limited
Rautomead Technology
for
Continuous Casting Of Silver & Gold

17. Rautomead Limited
Continuous casting is the process whereby molten
metal is solidified into a "semifinished" round, strip or
shape in a continuous stream for subsequent finishing
in downstream equipment.

18. Rautomead Limited
Critical Features for Silver & Gold casting:
• Melting & casting in a GRAPHITE CRUCIBLE to deoxidise and avoid contamination
• Secure connection between casting die and crucible to avoid leakage
• Accurate temperature control of liquid metal, especially at the entry to the casting die
• Safe operation & Collection of metal in an external enclosed graphite mould in the event of spillage
• Accurate control of the withdrawal pulling sequence and casting speed to achieve best quality
• Ability to adjust and move the position and orientation of the withdrawal unit to exactly line up with the
casting die
High Quality cast product is the requirement.
Rautomead technology includes the above features to provide the CAPABILITY.

19. Rautomead Limited
FEATURES OF TECHNOLOGY
• Graphite Crucible
• Graphite Heating System
• Submerged Graphite Die
• High Efficiency Copper Coolers
• Gas Bubbling
Accurate Melt Temperature Control
Removal of oxygen from metal
High purity metal processing without
contamination.

20. Rautomead Limited
FEATURES OF TECHNOLOGY
• Graphite Crucible
• Graphite Heating System
• Submerged Graphite Die
• High Efficiency Copper Coolers
• Gas Bubbling
Accurate Melt Temperature Control
Die heater concentrates heat at
the connection between die &
crucible.
Minimise “superheat” of metal

21. Rautomead Limited
FEATURES OF TECHNOLOGY
• Graphite Crucible
• Graphite Heating System
• Submerged Graphite Die
• High Efficiency Copper Coolers
• Gas Bubbling
Push fit connection between die & crucible
Die protected by nitrogen gas for long
operation life.
Withdrawal unit position adjustable to
accurately line up with casting die to
avoid leakage problem.

22. Rautomead Limited
FEATURES OF TECHNOLOGY
• Graphite Crucible
• Graphite Heating System
• Submerged Graphite Die
• High Efficiency Copper Coolers
• Gas Bubbling
Rautomead design of copper alloy plate
coolers for efficient and effective cooling
of metal.

23. Rautomead Limited
FEATURES OF TECHNOLOGY
• Graphite Crucible
• Graphite Heating System
• Submerged Graphite Die
• High Efficiency Copper Coolers
• Gas Bubbling
Option of nitrogen bubbling to assist with
alloy mixing and deoxidation, if required.

24. Rautomead Limited
GRAPHITE TECHNOLOGY
• High Purity Material
• No Contamination of the Melt
• Naturally Reducing, removing oxygen from liquid metal
• High Thermal Conductivity
• Good Machinability
• Increasing Strength with Increasing Temperature

25. Rautomead Limited
RMJ/H025 - 1994 and 2011 Shanghai Mint, Gold strip production

26. Rautomead Limited
RMT 200 1994 & 2011 Shanghai Mint Silver strip (shear cutting) & silver billet (saw cutting)

27. Rautomead Limited
RT650 Casting Silver Strip
Strip up to 400mm wide
Crucible 600 kg Ag

28. Rautomead Limited
RT650 Casting Silver Billet
Billet up to 150 mm dia
Crucible up to 600 kg Ag
Output up to 300 kg/hr
pure silver

29. Rautomead Limited
Rautomead furnace interior design– “RCF” Free
(Refractory Ceramic Fibre free) to comply with European health regulations)
High efficiency thermal insulating materials
Base for crucible can be seen,
“Drain tube” to guide liquid metal to collection dump box also visible.

30. Rautomead Limited
GRAPHITE TECHNOLOGY
• Simple design of heating element, ease of exchange and possibility for local supply
• Die heater concentrates heat at the point where die joins the crucible
• Elements surround the graphite crucible block

31. Rautomead Limited
Casting Die Assembly – for Strip
2 piece die design for ease of manufacture and refurbishment Multiple thermocouple to monitor die temp
Copper alloy coolers tightened together using screws Nitrogen gas feed to protect die
Hot end of die clamped with graphite clamp & graphite screws Insulation wool to create gas tight seal

32. Rautomead Limited
Casting Die Assembly – for Billet
2 piece die design for ease of manufacture and refurbishment Multiple thermocouple to monitor die temp
Copper alloy cooler Nitrogen gas feed to protect die
Feeder tube clamped with graphite screws Insulation wool to create gas tight seal

33. Rautomead Limited
Machine model capabilities (Figures are indicative only and for fine silver. Actual melting rate will be
influenced by feedstock & material.)
Model Power
(KVA)
Crucible
Capacity
(Litres)
Output
Solid Feed
(Kg/hr)
Strip
Width
(mm)
Billet
Dia.
(mm)
Tube
Dia.
(mm)
RMJ/H025 45 2 or 5.7 60Ag 125 35 35
RMT100 75 18 or 22 100Ag 200 95 95
RMT200 105 19 or 24 200 Ag 200 95 95
RT650 150 59 or 70 300 Ag 400 150 150
RT850 175 87 or 106 360 Ag 400 175 175
Note: For fine Silver the retention time to deoxidise the silver should also be
considered when selecting crucible size to output ratio of the machine. Feedstock
type will have an impact on Oxygen Levels.

34. Rautomead Limited
Why choose Rautomead ?
• Rautomead Equipment and technology will produce the highest quality continuous cast
product.
• Rautomead are an Experienced supplier with extensive established customer reference
list of MINTS. The “equipment works”. Many customers return to buy second, third and more machines.
• The complete system is designed and supplied by Rautomead (furnace, controls, casting die,
withdrawal system) as a comprehensive integrated system, assembled and tested at
Rautomead before shipment.
• (some other suppliers “buy in” power systems & furnaces from “third party suppliers of melting systems” and attach
their withdrawal pulling mechanism and die tooling to it).
• Rautomead have a local office representation to assist with communication and customer
support.
• Rautomead provide customers with drawings of all consumable high temperature
components (dies, elements etc) to give the option of local supply of future requirements.

35. Rautomead Limited
Thank You